Apply patch from Wiki bug report #615.

Thanks to Kernigh for the fix.

2 files changed, 9 insertions, 2 deletions

diff --git a/changes.txt b/changes.txt
index 97a5b78f..cb3288cf 100644
--- a/changes.txt
+++ b/changes.txt
@@ -1,5 +1,7 @@
 T.o.M.E 2.3.8 (ah)
 
+- Fix for Lua code which should hopefully get things working better
+  for OpenBSD users. Thanks to Kernigh for the patch.
 - Change "molten glass wall" to use a different internal code to
   hopefully avoid clashes with modules such as Theme.
 - Removed the check on low fuel on your light source when traveling.
diff --git a/src/lua/lapi.c b/src/lua/lapi.c
index 7be0ebfe..b597e00a 100644
--- a/src/lua/lapi.c
+++ b/src/lua/lapi.c
@@ -40,12 +40,17 @@ TObject *luaA_index (lua_State *L, int index) {
 
 
 static TObject *luaA_indexAcceptable (lua_State *L, int index) {
-  if (index >= 0) {
+  if (index == 0) {
+    return NULL;
+  } else if (index > 0) {
     TObject *o = L->Cbase+(index-1);
     if (o >= L->top) return NULL;
     else return o;
+  } else {
+    TObject *o = L->top+index;
+    if(o < L->Cbase) return NULL;
+    else return o;
   }
-  else return L->top+index;
 }